Strahlungsempfindliche Polymere,Verfahren zu ihrer Herstellung und Verwendung derselben

摘要

1343751 Chloro- and azidosulphonyl phthalic anhydrides UPJOHN CO 19 April 1972 [10 May 1971] 18187/72 Heading C2C [Also in Divisions C3 and G2] The preparation of 4-chlorosulphonyl-phthalic anhydride (I) and 4-azidosulphonylphthalic anhydride (II) is described. I is prepared by reacting PCl 5 with 4-sulphophthalic anhydride in acetonitrile suspension. II is obtained by subsequent reaction of I with sodium azide.